Good timing for the question
.
Walleye pig out on mayflys ( shadflys ) and their larvae.
That's why the fishing often gets a bit tougher at lots of places this time of year.
I've caught a few walleye on crystal green or white woolly buggers, using sinking line, fishing the same
places as you would with conventional gear. Just doing a gentle lift and drop with line. Figure the woolly buggers look like the larvae emgering from the
lake/river bottom and this can be as deep as 40 feet .
There's many fancy flies that can be used that represent " dun" or "hexagenia", stages of a mayfly that would
probably work too.
Got to like pulling fish in on a fly rod.